package demo2;

//相差不超过k的最多数
import java.util.*;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int k = in.nextInt();
        int[] arr = new int[n];
        for(int i = 0; i<n; i++) {
            arr[i] = in.nextInt();
        }
        Arrays.sort(arr);
        int ret = 0;
        int i = 0, j = 0;
        while(i<n) {
            while(j<i && arr[i] - arr[j] > k) {
                j++;
            }
            ret = Math.max(ret,i-j+1);
            i++;
        }
        System.out.println(ret);
    }
}